Vitocal 300-A

Air source heat pump

Two-stage air source heat pump for outdoor installation.

Rated heating output: 13.2 to 55.8 kW
High performance due to two-stage design
Cascade of five heat pumps for output up to 279 kW
Low running costs

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Rated heating output

13.2 to 55.8 kW

High heating outputs

With two-stage operation

Cascade of five appliances possible

Up to 279 kW output

Low running costs

Thanks to high COPs

Low noise and low vibrations

Due to sound-optimised appliance design

Flow temperature

Up to 64 °C (AWO 302.B60), up to 55 °C (AWO 302.B25/B40)

Good partial load characteristics

Thanks to two-stage design

Efficient defrosting

Through refrigerant circuit reversal

Easy to use Vitotronic control unit

With plain text and graphic display

Telecontrol and remote monitoring

Enables connection to Vitocom 100 and Vitocom 300

The outdoor heat pump meets the requirements for a convenient heat supply to offices or commercial buildings.

Vitocal 300-A –– highly efficient air source heat pump up to 47.2  kW

The Vitocal  300-A from Viessmann is an air source heat pump in the output range from 13.2 to 55.8  kW. An output of up to 279  kW is possible with a cascade of up to five Vitocal  300-A heat pumps.

With a high COP of up to 4.3 (A7/W35), the outdoor heat pump meets the requirements for a convenient heat supply to offices or commercial buildings. Even at outside temperatures as low as -22  °C, this unit still achieves a flow temperature of up to 64  °C.

Two output stages ensure the Vitocal  300‑A operates economically. Experience has shown that approximately 70  percent of the annual heat load can be covered under partial load conditions. This means the heat pump operates with only one compressor, which achieves the highest COP values.

The integrated range of solutions for the Vitocal 300-A

Benefit from the value added services and digital services of Viessmann's integrated range of solutions.

ViCare app

The ViCare app provides intuitive heating control. Green for go – the user can see at a glance in the app whether their heating system is working as it should.

More about the ViCare app

ViGuide app

ViGuide is an app for trade partners. It has numerous functions for monitoring and controlling systems in both detached houses and apartment buildings and provides rapid access to Technical Service.

More about the ViGuide app


The Vitoconnect is the interface between boiler and app – the prerequisite for heating system operation via smartphone and tablet. It also provides remote system maintenance capability for contractors using the Vitoguide app.

More about the Vitoconnect

Video: Where does environmental energy come from?

Carsten Kuhlmann explains where environmental energy originates and how various types of heat pumps make use of it.

Convenient control

The Vitotronic  200 (WO1C) is wall mounted inside the building for easy access, which facilitates straightforward commissioning and control of the heat pump. In a dual mode system, say in combination with a gas or oil boiler, the heat pump control unit can automatically start the second heat generator.

Furthermore, the Vitotronic  200 heat pump control unit is capable of communicating and, via the Vitocom  100 or Vitocom  300 communication module, allows the heat pump system to be set up, monitored and optimised over the internet with the Vitotrol  app on a smartphone or tablet.

Where the Vitocal  300‑A is used in commercial applications, it can also be linked to a building management system using Vitogate  200  KNX.

Vitotronic 200

Product details

Rated heating output (kW)

10.9 to 47.2  kW

COP in heating mode

Up to 4.3 (air 7  °C/water 35  °C)

Energy efficiency class

AWO 302.B25/B40: A++ / A+, AWO 302.B60: A+ / A+

Energy efficiency class in accordance with Commission Delegated Regulation (EU) No  811/2013 for heating, average climatic conditions –– low temperature application (35  °C) / medium temperature application (55  °C)

Application area

Large residential buildings, commercial enterprises, local authority premises, new build and modernisation projects


Vitotronic 200 control unit for wall mounting with plain text and graphic display, operation via ViCare app possible

DHW heating

Additional DHW cylinder required, resulting in a high level of DHW convenience.

Additional features

Where the Vitocal 300‑A is used in commercial applications, it can be linked to a building management system using Vitogate  200  KNX.

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